carmaker vs manufacturer

carmaker and manufacturer both are nouns.

Word	Noun	Adjective	Verb	Adverb
carmaker	Yes	No	No	No
manufacturer	Yes	No	No	No

As nouns, manufacturer is a hypernym of carmaker; that is, manufacturer is a word with a broader meaning than carmaker:

Other hypernyms of carmaker include maker, manufacturing business.

carmaker (noun)	manufacturer (noun)
a business engaged in the manufacture of automobiles	a business engaged in manufacturing some product
	someone who manufactures something